Drilling-machine.



G. R. MELLON. DRILLING MACHINE. APPLICATION FILED M1149, 1912.

1,061,622. Patented May v13, 1.913.

2 SHEETS-SHEET 1.

G. R. MBLLON.

DRILLING MACHINE. APPLIGATION FILED MAR.19, 1912. 1,061,622, PatentedMay13,1913.

- proved drilling machine.

Silit I GEORGE R. MELLON, OF KANSAS CITY, MISSOURI.

DRILLING-MAGHINE.

To all whom 'it may concern .4'

Be it known that I, GEORGE R. MELLoN, a citizen of thev United States,residing at Kansas City, in the county of Jackson and- State ofMissouri, have invented certain new and useful' Improvements inDrilling-Machines, of which the -following is a specifcation.

My invention relates to improvements in drilling machines, and oneobject is to provide a simple, light and efficient drill which can bereadily m'ounted on an ordinary worlrh bench for use.

One feature of the invention resides in a rot-ary table provided withwork-holding members of different forms to accommodate different kindsof work.

yAnother feature ofthe invention resides in novel means for feeding thedrill toward the table.

Other featuresof the invention will hereinafter appear, and in orderthat 'said inl vention may befully understood, reference will nowl bemade to the accompanying drawings, in which:

Figure l is a side elevation of my im- Fig. 2 is a rear elevation of therotary table forming one of the important features of the invention.Fig. 3 is an enlarged vertical section of a. head secured to the spindleof the machine. Fig. 4 is a modified .form of rotary table, and, Fig. 5is a vertical sectional view takenl through the rotary work holdingtable.

In carrying out the invention I employ a frame-1, having bearings 2 and3 in which are journaled main and countershafts 4 and 5, respectively.Main shaft 4 is provided with a ti ht pulley 6, a loose ulley 7 and acone pulley 8, which latteris Xed to shaft 4`and adapted, through theintermediacy of a belt (not shown) to drive a cone pulley 9 fixed uponthe counter-shaft 5, which latter also, is provided'with a large fixedpulley` 10. Pulley l0 drivesa flanged pulley 11 through the intermediacyofabelt 12, runover idlers 13, mounted upon a stub- 14,c'arried by t-heupper rear portion of frame 1. Pulley 11 is interposed between, a pairof vertical bearings' 15 in which a vertically-movable spindle 16 isjournaled,` said spindle having' the customary grooveand-featureconnection (not shown) with y the pulley,

so that the same ma rotate said spindle without moving vertical ytherewith.

Specification ofLetters Patent. applicati@ filed March 1s, 1912,

- `26 supported by a cone 27, secured ing stud 39adapted Patented May13, 1913. Serial No. 684,847.

`Spindle 16 is provided at its lower end with a suitable chuck 17 forholding drill 18, and said spindle 16 is adjusted toward a r0- tarytable 19 through the intermediacy of a feed-lever 20, slidably-mountedin a fulcrum 21 on the uppei portion of frame 1. Feed-lever 20 has ahandle' 22 at one end and a curved extension 23 at its opposite end,which is'free to slide in fulcrum 21 and .permlt handle 22 to swingupward with a he'ad 24 having a cup 25` restingr upon balls to spindle 17 by a transverse pin 28. Head cup 25 do not rotate with the spindle 16,but on the contrary are held from rotation by a pair of trunnions 29projecting laterally from opposite sides of said head 24'and engaged ythe bifurcated portions 30 of the feed-lever 20. Feed-lever 20 is heldfrom lateral movement by the bifurcated upper end of a guide 31, fixedto the uppermost bearing 15. Spindle 16 is normally held in raisedposition by a helical spring 32, interposed between the'uppermostbearing 15 and t-he lower terminal of head 24.

The rotary table 1 9 is journaled upon a stub-shaft 33 projecting from across-head 34 movably-mounted upon a vertical slideway 35 on frame 1.Crosshead 34 is locked 4at any point of its adjustment on the slide- 24and its i way 35 bv a screw 36 extending through a vertical slot 37inframe 1 and provided at its rear end with a pivoted handle 38 where- Yby it may be'turned to loosen or tighten the crosshead. Cross-head 34 isprovided at its upper portion with a forwardly-projectto enter any oftheholes 40, extendin through the rear circular end 41 of the ta le 19. Therotary table 19 is prevented from accidentally moving forward out ofengagement with stud 39 by a helical spring 42 embracing the forwardreduced portion of stub-shaft 33, which is provided at its forward endwith a head 43, to hold the spring 42 ,under compression against awasher 44 bearing against the front end of the tablev19. Table 19 is prfvided 'at its forward portion with a plurality of radial work-holdingmembers- 45, equal in number to the holes 40, and of different shape toaccommodate various kinds of work. y

Inrpractice the spindle 16 is driven at 'suitable speed and after thetable.19 has been a justed vertically to accommodate the work to beoperated upon, the drill is forced downv into engagement with the workby pressing downward upon the feed-lever 20. When the hand-lever isforced downward, friction between the non-rotary head 24 and the rotaryspindle 16 is reduced to a minimum Mby the ball-bearinff 26 interposedbetween said head and spindle. Vhen it is desired to raise the drill 18from the work, it is onlynecessary to relieve the feed-'lever .20 of'-worlcholding member is brought into position, when the table isreleased to engage the stud 39, where it is reliably held bythe spring42.

' shaft.' projecting be ond the front end of the Having thus describedmy invention lwhat I claim anddesire to secure by Letters Patent, is: nA t.

l. In combination with a frame, a, crosshead connected to theframe, ahorizontal stub-shaft rigidly carried by the cross-head, a rigid studcarried by the cross-head, a

table slidable vand rotatable on said stubshaft and having a series ofopenings to receive said stud, the forward end of the stubtableandhaving n'abutment thereon, and

a coil springv ,surrounding `s aid projecting T l 2. in combination witha frame,' a crosshead connected to the frame, a rigid horizontalstub-shaft carried by the cross-head2 n a table slidably and rotatablyYIrl/Quilted on the stub-shaft, means between the crosshead andthefinner end of the table to lock thel'attern Various positions to thecrossliead, and spring means engaging the outer end of the -table tonormally hold same against sliding movement.

8. In Combination with a frame,v a crosshead vconnected to the frame,.ahorizontal stub-shaft rigidly secured at its rear end to said crosshead,a stud rigidly secured to the cross-head and projecting outwardlytherefrom,` a table s'lidable and rotatable on said stub-shaft, saidtable having a rear circular enlarged end having a series of openings toreceive saidy stud, the front end of said -stub shaft heingreduced indiameter and projecting beyond the front end of vthe table, a coilspring surrounding the reduced 'frontend of the stub-shaft and engaging'the front end of the table,and a head` on. the extremity of saidreduced end of thestub shaft 'engagingthe outer end ofsaid spring.

v In testimony whereof I aflix my signature,

in the presence of two witnesses.

'Y GEORGE YR'. MELLON.

Witnesses: 4' y E.' C. LILLIAN, F. G; F1sc`HER.-

